This article considers the issue of law governing the maintenance. The Hague Protocol of 23 November 2007 on the law applicable the maintenance obligations is the basic source of law in Poland. The Protocol became a part of EU law order since 18 June 2011 under the Article 15 of the Regulation (EC) No 4/2009 of 18 December 2008 on jurisdiction, applicable law, recognition and enforcement of decisions and cooperation in matters relating to maintenance obligations. In accordance with the Article 15 of this Regulation the law governing the maintenance obligations is defined in The Hague Protocol of 23 November 2007 on law applicable the maintenance obligation in Member States binding by this Protocol. Article 76 of the Regulation states that the Regulation shall be applied from 18 June 2011. The issues discuss in the article: the scope of the binding force of the Protocol and the Main Aspect of rules on connection of the maintenance obligations to the law of given State provided in the Protocol.